Grinding wheel mounting and control



June so, 1942.

M. H. ARMS ETAL GRINDING WHEEL MOUNTING AND CONTROL Filed April 23, 1940June 30, 1942. M. H. ARMS ETAL 2,288,508

GRINDI NG WHEEL MOUNTING AND CONTROL Flled Apnl 23 1940 2 Sheets-Sheet 2Patented June 30, 1942 UNITED STATES GRINDING WHEEL MOUNTING AND CONTROLMerton H. Arms and Joseph B. Johnson, Springfield, Vt., assignors toBryant Chucking Grinder Company, Springfield, Vt., a corporation ofVermont Application April 23, 1949, Serial No. 331,070

8 Claims.

This invention relates to the mounting of grinding whee1s by which theymay be given axial and rotary motions. The axial motions may, ifdesired, be obtained by fluid pressure mechanism.

One object of the invention is to provide such method in which anaccurate and positive control of the grinding wheel is had with simplemechanism.

A further object is to provide for considerable length of wheel pathwhile maintaining the mechanism within a short length except when thelong traversing distance is employed.

Further objects and advantages will appear from a more completedescription of certain embodiments of the invention shown in theaccompanying drawings in which Figure 1 is a somewhat diagrammatic frontelevation illustrating one embodiment of the invention, certain of theparts being shown in section.

Figure 2 is a right hand elevation of the same.

Figure 3 is a detail section on line 33 of Figure 1.

Figures 4 and 6 are views similar to a portion of Figure 1, but showingmodifications.

Figures and 7 are right end elevations of the structures shown inFigures 4 and 6, respectively.

Figure 8 is a detail section on line 8-8 of Figure 6.

Referring first to the construction shown in Figures 1 to 3, at I isindicated the bed of the machine carrying at one end, herein shown theleft hand end, a transverse slide 2 carrying a rotary work holder 3.Opposite to this work holder, and as shown, at the right end of the machine, the bed is provided with an upstanding support 5. This support isprovided with a bore 6 within opposite ends of which are secured thebearing bushings I and 8. Slidable through these bushings is a wheelslide formed by a sleeve 9 having intermediate its length and betweenthe bushings I and 8 an enlarged diameter portion In forming a pistonslidable within the bore 6 and provided with suitable packing rings tomake a fluid tight joint therewith.

Journaled within the forward portion of the sleeve 9, and as showncoaxially therewith, is a second sleeve I! within which is journaled agrinding wheel shaft I2 carrying a grinding wheel l3 at its outer end.As shown the grinding wheel shaft I2 is also coaxial with the sleeves IIand 9. This shaft at its rear end is coupled by the coupling [4 to ashaft l5 journaled at opposite ends as at 16 and I1 within the sleeve 9.This shaft I5 extends through a cap I8 closing off the rear end of thesleeve 9 and carries outwardly thereof a belt pulley I9. This beltpulley carries a belt 29 which passes around a driving pulley M of amotor 22 which thus rotates the grinding wheel.

The motor 22 is shown as secured to the lower face of a rearwardextension of a hood member 23 secured to the sleeve 9 and cap l8 andwhich arches over and encloses and covers the support 5 and has a skirt24 which extends down close to the upper face of the bed I. The bed isprovided with a marginal upstanding rib 25 in opposed relation to thelower edge of the skirt 24. Means may be provided for preventingrotation of the sleeve 9. For this purpose, as shown, the forward end ofthe hood 23 has an opening 28 to receive the sleeve 9 and it extendstherebeneath where it supports one end of a guide bar 39 which extendsthrough a perforated lug 3I of the support 5. The rear end of the bar 38is also carried by the outer end portion of the hood 23 as at 32 abovethe motor 22.

The axial motion of the wheel is preferably produced by a fluid pressuresystem, ordinarily hydraulic, and for this purpose pipes 35 and 36opening into the bore 6 just inwardly of the bushings I and 8 and onopposite sides of the piston I9 are provided, these pipes leading to thefour-way valve 38 by which they may be selectively brought to registerwith pressure supply and exhaust pipes 39 and 40, respectively.

In Figures 4 and 5 a slight modification is shown in which instead ofsupporting the motor on the under side of the hood 23, it is mounted onthe end of the hood 23a and its driving shaft 45 may be in alinementwith the wheel shaft I2a and may be either a part thereof or be coupledthereto as may be found desirable.

In Figures 6 and 7 provision is made for giving an extended traverse tothe grinding wheel beyond what may be obtained by the construction shownin Figures 1 to 5. In this figure the wheel slide support, instead ofbeing a part of the bed of the machine, is a separate slide 59 mountedon ways 5| on the upper face of the bed. This slide 59 has mountedtherein the wheel slide sleeve 9 with its piston I9 and carries thesleeve I I within which the wheel shaft [2 is journaled. This wheelshaft is shown as coupled to the drive shaft I5 in the same way as shownin Figures 1 to 3. This drive shaft is provided with a driving pulleyI9. Instead of supporting the driving motor 22b from beneath, it isshown in these figures as supported on the top of the hood member 23 andis belt connected to pulley I9 as by the belt 55. To prevent rotation ofthe wheel slide, this hood 23 is provided with a guide bar 39b which isslidably guided through a portion of the support 59 and this support 59is also connected to moving means. As shown it is provided with adepending arm 56 to which is secured the forward end of a piston rod 57extending into a cylinder 59 where it carries a piston 59 slidable inthis cylinder. Fluid under pressure is supplied to either end of thiscylinder beyond the piston 59, while being discharged from the other endof the cylinder, through the pipes G and El leading to the four-wayvalve 62. Pressure and discharge pipes 63 and 64 communicate with thisfour-way valve 62 so that the piston 59 may be driven from one to theother end of the cylinder, thus to move the support slide 56 parallel tothe movement of the sleeve 9 within the support 58. The slide motion ofthe sleeve 9 may also be produced, as in the construction of Figure 1,by the four-way control valve 38 which controls the supply and dischargethrough the pipes 39 and 40 to the pipes 35 and 36 leading to the boreof the support i! on opposite sides of the piston l6. Thus with thisconstruction there is an additional length of traversing movement forthe wheel over that which may be produced by the motion of the sleeve 9with respect to the support. As shown the two means for producing suchmotion are independently controlled, each by its own four-way valve 38or 62.

From the foregoing description of certain embodiments of this invention,it should be evident to those skilled in the art that various changesand modifications might be made without departing from the spirit orscope of this invention as defined by the appended claims.

We claim:

1. In combination, a support having a bore extending therethrough, amember slidable axially within said bore, a rotary tool shaft journaledwithin said member, means for preventing relative axial motion betweensaid member and shaft, means for rotating said shaft, means fortraversing said shaft and member as a unit, and a hood carried by saidmember and covering said support.

2. In combination, a support having a bore extending therethrough, amember slidable axially within said bore, a bed carrying said supportfor motion parallel to the motion of said member, a rotary tool shaftjournaled within said member, means for preventing relative axial motionbetween said member and shaft, means for rotating said shaft, means fortraversing said shaft and member as a unit, and a hood carried by saidmember and enclosing a portion of said bed.

3. In combination, a support having a bore extending therethrough, amember slidable axially within said bore, a bed carrying said supportfor motion parallel to the motion of said member, a rotary tool shaftjournaled within said member, means for preventing relative axial motionbetween said member and shaft, means for rotating said shaft, means fortraversing said shaft and member as a unit, and a hood carried by saidmember and enclosing said support and a portion of said bed.

4. In combination, a support having a bore extending therethrough, amember slidable axially within said bore, a bed carrying said supportfor motion parallel to the motion of said member, a rotary tool shaftjournaled within said member, means for preventing relative axial motionbetween said member and shaft, means for rotating said shaft, means fortraversing said shaft and member as a unit, a hood carried by saidmember and enclosing said support and a portion of said bed, and meansfor moving said support on said bed.

5. In combination, a support having a bore extending therethrough, apair of bearing bushings spaced axially in said bore, a sleeve slidableaxially through said bushings and having an enlarged diameter portionbetween said bushings forming a piston axially movable within said bore,a rotary grinding wheel shaft journaled in said sleeve, means preventingrelative axial motion between said sleeve and shaft, means for rotatingsaid shaft, a fluid pressure mechanism opening into said bore betweensaid bushings on opposite sides of said piston, means for controllingsaid pressure mechanism to cause traverse of said sleeve and shaftaxially, a bar arranged parallel to said sleeve and axially slidablethrough said support, and means securing said bar to said sleeve.

6. In combination, a support having a bore extending therethrough, apair of bearing bushings spaced axially in said bore, a sleeve slidableaxially through said bushings and having an enlarged diameter portionbetween said bushings forming a piston axially movable within said bore,a rotary grinding wheel shaft journaled coaxially in said sleeve, meanspreventing relative axial motion between said sleeve and shaft, meansfor rotating said shaft, a fluid pressure mechanism opening into saidbore between said bushings on opposite sides of said piston, means forcontrolling said pressure mechanism to cause traverse of said sleeveandshaft-axially, and a hood carried by said sleeve and enclosing a portionof said support.

7. In combination, a support having a bore extending therethrough, apair of bearing bushings spaced axially in said bore, a sleeve slidableaxially through said bushings and having an enlarged diameter portionbetween said bushings forming a piston axially movable within said bore,a rotary grinding wheel shaft journaled coaxially in said sleeve, meanspreventing relative axial motion between said sleeve and shaft, 21

H fluid pressure mechanism opening into said bore between said bushingson opposite sides of said piston, means for controlling said pressuremechanism to cause traverse of said sleeve and shaft axially, a hoodcarried by said sleeve and enclosing a portion of said support, and amotor carried by said hood and in driving relation to said shaft.

8. In combination, a support having a bore extending therethrough, apair of bearing bushings spaced axially in said bore, a sleeve slidableaxially through said bushings and having an enlarged diameter portionbetween said bushings forming a piston axially movable within said bore,a rotary grinding wheel shaft journaled coaxially in said sleeve, meanspreventing relative axial motion between said sleeve and shaft, meansfor rotating said shaft, a fluid pressure mechanism opening into saidbore between said bushings on opposite sides of said piston, means A forcontrolling said pressure mechanism to cause traverse of said sleeve andshaft axially, means carrying said support for motion parallel to thatof said sleeve, and fluid pressure means for moving said support.

MERTON H. ARMS. JOSEPH B. JOHNSON.

